This is a draft cheat sheet. It is a work in progress and is not finished yet.
Cos đối
cos(-x)=cos(x) |
sin(-x)=-sin(x) |
tan(-x)=-tan(x) |
cot(-x)=-cot(x) |
Sin bù
sin(π-x)=sin(x) |
cos(π-x)=-cos(x) |
tan(π-x)=-tan(x) |
cot(π-x)=-cot(x) |
Phụ chéo
sin(π/2 -x)=cos(x) |
cos(π/2 -x)=sin(x) |
tan(π/2 -x)=cot(x) |
cot(π/2 -x)=tan(x) |
Sin ít cho nhiều
sin(π/2 +x)=cos(x) |
cos(π/2 +x)=-sin(x) |
tan(π/2 +x)=-cot(x) |
cot(π/2 +x)=-tan(x) |
Khác π tan cot
tan(π+x)=tan(x) |
cot(π+x)=cot(x) |
sin(π+x)=-sin(x) |
cos(π+x)=-cos(x) |
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